裂隙岩体双重介质非达西渗流与应力耦合流变效应研究

项目名称： 裂隙岩体双重介质非达西渗流与应力耦合流变效应研究

项目编号： No.51509145

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 水利工程

项目作者： 赵茉莉

作者单位： 山东大学

项目金额： 20万元

中文摘要： 随着资源开采向深部的转移，破碎岩体增多、地应力增大等地质条件明显恶化。在高地应力等复杂地质条件下，岩体所呈现出的流变特性非常显著。与此同时，渗流作用明显加剧了岩体的蠕变特性。本项目拟采用试验研究、理论分析以及数值模拟的综合研究方法，系统研究裂隙岩体双重介质非达西渗流与应力耦合流变效应。通过裂隙岩石不同含水状态和不同应力状态下的蠕变试验，研究渗透压力对岩石蠕变变形的影响规律，建立相应的流变模型；研究双重介质模型非达西渗流系统稳定性的影响因素，给出系统在稳定状态下受到扰动时的各参数响应；将理论分析与数值计算相结合，编制程序实现所提模型的数值模拟，并与试验结果相比较得出结论，研究成果对实际工程应用具有重要参考价值。

中文关键词： 双重介质模型；应力-渗流耦合；流变模型；稳定性分析；非达西渗流

英文摘要： With the transfer of resources exploitation to the deeper part of the earth, broken rock mass and ground stress increases will greatly deteriorate geological conditions. Under the complex geological conditions, such as high ground stress, it is a significant phenomenon of rock mass having a large deformation and rheological properties. At the same time, the effect of seepage vigorously promote the rheological deformation of rock mass. This project adopts a combination method of the experimental study and theoretical analysis and numerical simulation to research the rheological effect of fractured rock mass in dual-porosity media with coupled non-darcy seepage flow and stress. Through creep tests on fractured rock under different moisture state and stress state, we will find the influence law of the osmotic pressure to rock rheological deformation and then estabilish the corresponding rheological model. Research on the nondarcy coefficient influence on the stability of the dual-porosity medium system and the stability response parameters, combines theoretical anlaysis and numerical calculation. Finally, we will give the given model's numerical simulation program. This project have more important values to the practical engineering application.

英文关键词： dual-porosity medium;coupled stress and seepage field;rheological model;stability analysis;nondarcy flow